Improvement in weft-stop mechanisms for looms



UNITED STATEs PATENT OFFICE.

-wiLLAnD ooMEY, 0E wEsTEonoUeH, Assienon ToV THE AMERICAN sTor- MOTION COMPANY, .OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN WEFT-STOP MECHANISMS FOR LOMS.

Specification forming pal-t of Letters Patent No. 146,574, dated January 20, 1874; application filed May 2, 1873.

`To all whom it may concern:

Be it known that I, WILLARD COMEY, of Westborough, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Looms, of which the following is a specification:

My present invention relates to certain im provements in an invention secured to myself and Sidney S. Turner by Letters Patent oi' the United States dated July 16, 1872, and numbered 129,212, entitled weft-stop mechanism for looms,77 the object sought being to so arrange the weft-detecter device that it shall be sure in its action to operate upon the beltshifting de vice when the weft-thread is absent from the detecter either from being broken or from being all off from the bobbin. To secure this action, it is necessary that the threads that have already been beaten up and incorporated in the cloth, and yet extending directly from the selva-ge to the shuttle, as is the case in all looms of the drop-box order-that is, in looms in which more than one shuttle is usedshould be kept away from the detecters. This is accomplished by employing detecter-guards, which consist of rods or hooks so arranged as to project above the lay at a certain part of the stroke of the lay, that they will prevent the threads that have been beaten up, and extend-from the edge of the cloth to the shuttles in the boxes, from falling back onto the lay; and at another part of the stroke the guards must be withdrawn, so as to allowr the thread that has just been beaten up to remain so, and not be pulled back by the guard as it retreats with the lay. These guards may be op erated from above or below the lay, and may be varied in form and mode of action. My in vention also relates to a device for operating the detecterforks.

Figure 1 is a perspective view of a loom upon which my invention is attached. Fig. 2

` is a vertical section through the lay and beam of a loom, and shows my device for operating the weft-detecter. Fig. 3 is a plan of a part of the lay, and serves to illustrate the action of the threads in relation to the detecters and the detecter-guards.

y Let A B represent .the frame of an ordinary drop-'box loom, all the parts of which, except are the pickershafts,wl1ich, operating through the arm K3, straps K2, and picker-stad' H1, give motion to the shuttle.

The weft-detecters C B C' B and beltshipping device N are made as shown in Figs. 1 and 2, and are fully described in the Letters Patent above referred to.

The detecterguard F, Fig. 1, consists of a y rod, the lower end of which is attached to an arm, F3, on the picker-shaft I), so that each motion of the picker-shaft will cause a vertical motion of the detecterguard F. The funcA tion of this guard F is illustrated in'Fig. 3, in which C represents the lay; W, the clot-h y,

the thread that has been beaten up, and w the thread that is being beaten up, the two threads being connected with their shuttles in the box H, the thread y that has been beaten up being held away from the detecter by the guard F.

Fig. 3 represents the position of the cloth, threads, and detecter-guard when the lay is at the end of its forward stroke. lVhen the lay retreats, the cloth W remaining stationary, it

is necessary that the guard1 F be withdrawxu' so that it may pass back with the lay under the thread x; but when the lay again advances the guard F comes into position, and pushes back the thread w, which has become,in' its turn, a beaten-up thread.

In Fig. 2, I show my method of operating the detecter-forks. C Gf represent the detecter-forks, which are pivoted onr a rod, D', extending along the back of the lay, so as to connect the two detecters, one of which is 1ocated at each end of the lay, Fig. l. To the rod D', Fig. 2, I attach a lappet, D, upon which the bent lever El acts. Thus, When'the lever is thrown up, it forces 11p the lappet and causes the rod to revolve, which throws up them detecter-forks G' C", and when the lever falls the detecter-forks fall. The leverEl is operated by the cam-piece Gr G,wl1ch, being attached to the breastbcam It, is stationary, and

aots' on the roller Esto throw up the lever El` D, Wththe bentvlever E', pivoted as shown,

as the lay moves over it. arm G G, and breast-beam R, constructed I claim as my inventionand arranged as described, and for the purpose 1 1. 121QODnebQtOItll Witlledneeltlansm fra set forth.

001D 6 C0111 1113 110D O e C 6C ,GF-"u-I' arm 7F3, and picker-shaft P, eoustruted and W'ILLARD COMEY' arranged as described. v Witnessesz 2. The combination of the rod D", having VILLIAM EDSON,

at its ends the deteetels C C and the lappet FRANK Gr. PARKER. 

